Funny thing is the most laid back and least prima donna-like diver I have met would be Dave Mullins. (he has posted on here as Mullins in the past). He is Wellington-based and one of the worlds top free-divers. (NZ punches above it's weight in this niche sport it seems.)

Quite a few of the others seem to have got right in to the yoga and meditation side of things ... along with talking about the mystical nature of stuff ...